artesian well


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Related to artesian well: Artesian spring, Artesian basin

artesian well,

deep drilled wellwell,
aperture in the earth's surface through which substances in a natural underground reservoir, such as water, gas, oil, salt, and sulfur, can flow or be pumped to the surface. In the United States, until some years after the Civil War, the majority of wells were "open," i.e.
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 through which water is forced upward under pressure. The water in an artesian well flows from an aquifer, which is a layer of very porous rock or sediment, usually sandstone, capable of holding and transmitting large quantities of water. The geologic conditions necessary for an artesian well are an inclined aquifer sandwiched between impervious rock layers above and below that trap water in it. Water enters the exposed edge of the aquifer at a high elevation and percolates downward through interconnected pore spaces. The water held in these spaces is under pressure because of the weight of water in the portion of the aquifer above it. If a well is drilled from the land surface through the overlying impervious layer into the aquifer, this pressure will cause the water to rise in the well. In areas where the slope of the aquifer is great enough, pressure will drive the water above ground level in a spectacular, permanent fountain. Artesian springs can occur in similar fashion where faults or cracks in the overlying impervious layer allow water to flow upward. Water from an artesian well or spring is usually cold and free of organic contaminants, making it desirable for drinking. In North America, the Dakota sandstone provides aquifers for an artesian system that underlies parts of the Dakotas, Montana, Wyoming, Kansas, Nebraska, and Saskatchewan and supplies great quantities of water to the dry Great Plains region. Many East Coast cities derive their water supplies from aquifers that are exposed along the edge of the Piedmont and dip downward toward the Atlantic coast. The largest artesian system in the world underlies nearly all of E and S Australia. Other important artesian systems serve London, Paris, and E Algeria.

artesian well

[är′tē·zhən ′wel]
(hydrology)
A well in which the water rises above the top of the water-bearing bed.

artesian well

a well sunk through impermeable strata into strata receiving water from an area at a higher altitude than that of the well, so that there is sufficient pressure to force water to flow upwards
References in periodicals archive ?
Artesian wells, which rely on natural pressure to reach water supplies, is located on private property, while deeper wells, drawing on underground sources of water, require a license from the state; the Water Ministry halted the process of filing requests for licenses for these wells several years ago.
This is in addition to preparing 52 artesian wells drilled in the last period in the Abu Simbel area, he added.
Governor Kheir-Eddin al-Sayyed affirmed during the meeting, which took place on Monday, that work is underway to repair old artesian wells and drilling new ones in Idleb city to support the existing water resources and improve the situation of drinking water in it.
Geagea suggested drilling artesian wells in the coastal area, or transferring sea water from the mouths of rivers to pumping stations close to residential communities.
The water is obtained from various sources such as wells, springs, artesian wells, and the municipal water supply.
The ERC completed work on 4 artesian wells in Iraqi Kurdistan, providing clean water to 150,000 people.
The ERC also completed work on four artesian wells in Arbil in Iraqi Kurdistan, providing clean water to 150,000 people.
He said the municipality had assigned a contractor to seal the unused wells after installing artesian wells to provide water for public parks.
Overall, the Segregation Wall in the Bethlehem Governorate will end up amputating some 159,793 dunums of landsbehind the Wall, and threatens crucial supply areas containing artesian wells and main water basins that provide Bethlehem Governorate with water as the path of the Wall is designed to enfold the groundwater locations withinBethlehem.
There weren't many subjects I did like apart from English and art; history with centuries of royals was so boring and geography was worse because the teacher had a boring droning voice which made the subject even worse, drone drone, artesian wells, tundra, pampas, delta drone drone.
It has planted thousands of trees and saplings, established green spaces and has extended irrigation networks for cultivation up to about 6000 meters in length, in addition to carrying out maintenance of about 390 assorted sources of water, including regular wells, artesian wells and water reservoirs etc.
Waad has adopted modern criteria to build earthquake-proof apartment blocs, widen streets and pavements in this once-congested area and put parking lots and artesian wells where there were none.